how to get number of rows effected as a numerical value - sql-server

Question

I have this procedure to delete a row from table
CREATE PROCEDURE [dbo].[spConfiguration_test]
#ID int
AS
Declare #ERR int
set #ERR = 0
DECLARE #Rows int
SET #Rows =0
begin tran
delete from de where ClaimVersion=5
set #ERR = ##Error
SELECT #Rows= #Rows + ##ROWCOUNT;
if #ERR = 0 commit tran
else rollback tran
I want it return a value like 1 or 2 or 3 depending on the number of rows deleted
but it gives me (1 row(s) affected)
what changes do I have to make?

Answer 1

Note that the sp prefix on stored procedure names should be left for Microsoft's use.
If you want to have access to the flag that indicates whether or not rows were deleted then you probably want to add it as an output parameter.
Using a transaction to wrap a single DELETE statement isn't going to do much. I've left the transaction code in on the assumption that this is part of a larger procedure.
If you do have multiple steps within the transaction you may want to use RaIsError to indicate to the caller where a problem occurred and provide some application specific context, e.g. the arguments passed to the procedure.
You can also use try/catch in a stored procedure. Sometimes handy, sometimes clumsy depending on what sorts of operations you need to perform and how much you need to know about exceptions.
create procedure [dbo].[Configuration_test]
#Id Int, -- Unused.
#Deleted Int Output -- Flag: 1 if any rows are deleted, 0 otherwise.
as
set nocount on
declare #Err as Int = 0;
set #Deleted = 0;
begin transaction;
delete
from de
where ClaimVersion = 5;
select #Deleted = case when ##RowCount > 0 then 1 else 0 end,
#Err = ##Error;
if #Err != 0
begin
rollback transaction;
return;
end;
-- Next operation...
set #Err = ##Error;
if #Err != 0
begin
rollback transaction;
RaIsError( 'Boo boo in step 42 processing Id %d.', 13, 42, #Id );
end;
-- Repeat operation/error check...
commit transaction;

Answer 2

Move the reference to ##RowCount immediately after the delete. Or, combine the two assignments in one statement:
delete from de where ClaimVersion = 5 ;
select #Rows = #Rows + ##ROWCOUNT, #ERR = ##Error;

Answer 3

The issue you are facing is that ##RowCount returns the number of rows affected by the previous statement.
In your case the previous statement is: set #ERR = ##Error
Try this instead
DELETE
FROM de
WHERE ClaimVersion = 5
;
SELECT #ERR = ##Error
, #Rows = ##RowCount
;
PRINT #Rows;
P.S. don't prefix your procedure names with things like "sp". It's as bad as prefixing all your tables with "tbl".

Answer 4

You can also SET NOCOUNT OFF.
Remarks
When SET NOCOUNT is ON, the count (indicating the number of rows affected by a Transact-SQL statement) is not returned. When SET NOCOUNT is OFF, the count is returned.
CREATE PROCEDURE [dbo].[spConfiguration_test]
#ID int
AS
Declare #ERR int
set #ERR = 0
SET NOCOUNT OFF
begin tran
delete from de where ClaimVersion=5
set #ERR = ##Error
if #ERR = 0 commit tran
else rollback tran
After SP Creation execute the SP As follows :
EXEC [dbo].[spConfiguration_test]
#ID = 0